/*
 * MIT License
 *
 * Copyright (c) 2020 wen.gu <454727014@qq.com>
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

/***************************************************************************
 * Name: object_subscriber.h
 *
 * Purpose: a subcriber implementation for object(event, field)
 *
 * Developer:
 *   wen.gu , 2021-05-10
 *
 * TODO:
 *
 ***************************************************************************/

/******************************************************************************
 **    INCLUDES
 ******************************************************************************/
#ifndef __SUBSCRIBE_OBJECT_H__
#define __SUBSCRIBE_OBJECT_H__

#include "type_defs.h"
#include "message.h"
#include "serializer.h"
#include "deserializer.h"
#include "proxy_requester.h"
/******************************************************************************
 **    MACROS
 ******************************************************************************/


/******************************************************************************
 **    TYPE DEFINITIONS
 ******************************************************************************/



/******************************************************************************
 **    CLASSES/FUNCTIONS DEFINITIONS
 ******************************************************************************/
template<typename ObjectType>
class ObjectSubscriber
{
public:
    using ObjectHandler = std::function<void(const ObjectType&)>;
protected:
    ProxyRequesterPtr proxy_;
    MessageType type_;
    MessageId message_id_;
public:
    ObjectSubscriber(ProxyRequesterPtr proxy, MessageType type, MessageId msg_id)
    :proxy_(proxy),
    type_(type),
    message_id_(msg_id)
    {
        /** todo something */    
    }
    virtual ~ObjectSubscriber()
    {
        /** todo something */
    }
public:
    bool SetHandler(ObjectHandler handler)
    {
        return proxy_->RegisterReceiveHandler(type_, message_id_, [this, handler](MessagePtr msg)
        {
            ObjectType val;
            DeserializerPtr deser = this->proxy_->GetDeserializer(msg->payload());
            if (deser->Deserialize(val))
            {
                if (handler)
                {
                    handler(val);
                }
            }             
        });   
    }

    bool UnsetHandler()
    {
        return proxy_->UnregisterReceiveHandler(type_, message_id_);
    }


    bool Subscribe()
    {
        return proxy_->Subscribe(message_id_);
    }

    bool Unsubscribe()
    {
        return proxy_->Unsubscribe(message_id_);
    }

    MessageId message_id() const { return message_id_;}
};

#endif /** !__SUBSCRIBE_OBJECT_H__ */

